<template>
  <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" v-on="$listeners" />
  <svg v-else :class="svgClass" aria-hidden="true" v-on="$listeners">
    <use :xlink:href="iconName" />
  </svg>
</template>

<script>
function isExternal(path) {
  return /^(https?:|mailto:|tel:)/.test(path);
}

export default {
  name: 'SvgIcon',
  props: {
    iconClass: {
      type: String,
      required: true,
    },
    className: {
      type: String,
      default: '',
    },
  },
  computed: {
    isExternal() {
      return isExternal(this.iconClass);
    },
    iconName() {
      return `#svg-icon-${this.iconClass}`;
    },
    svgClass() {
      if (this.className) {
        return 'svg-icon ' + this.className;
      } else {
        return 'svg-icon';
      }
    },
    styleExternalIcon() {
      return {
        mask: `url(${this.iconClass}) no-repeat 50% 50%`,
        '-webkit-mask': `url(${this.iconClass}) no-repeat 50% 50%`,
      };
    },
  },
};
</script>

<style lang="scss" scoped>
.svg-icon {
  width: 1.25em;
  height: 1.25em;
  vertical-align: -0.15em;
  overflow: hidden;
  fill: currentColor;

  &:hover {
    opacity: 0.8;
  }
}

.svg-external-icon {
  display: inline-block;
  background-color: currentColor;
  mask-size: cover !important;
}
</style>
